/// <summary>
/// Appends an attribute to a block reference. This extends the native AppendAttribute Method.
/// </summary>
/// <param name="blockReference">The block reference.</param>
/// <param name="attributeReference">The attribute definition.</param>
/// <param name="overwrite">Overwrite if the attribute already exists.</param>
/// <param name="createIfMissing">Create the attribute if it doesn't already exist.</param>
public static void AppendAttribute(this BlockReference blockReference, AttributeReference attributeReference, bool overwrite = true, bool createIfMissing = true)
{
using (var trans = HostApplicationServices.WorkingDatabase.TransactionManager.StartTransaction())
{
var attrs = blockReference.GetBlockAttributes();
if (!attrs.ContainsKey(attributeReference.Tag))
{
if (createIfMissing)
{
blockReference.AttributeCollection.AppendAttribute(attributeReference);
}
}
else
{
if (overwrite)
{
blockReference.AttributeCollection.AppendAttribute(attributeReference);
}
}
trans.Commit();
}
}
